落叶松毛虫生物学特性及天敌

文章针对内蒙古自动区大兴安岭地区的落叶松毛虫的生物学特性及其天敌进行了研究。结果表明此虫在内蒙古绰源地区两年一代代占９３％，一年一代占７％。１９９５年调查发现落叶松毛虫的世代在东北及内蒙古有三种情况：１．黑龙江省大兴安岭十八站、呼玛县、新林、松岭等地区的落叶松毛虫为两年一代；２．黑龙江的齐齐哈尔、伊春、佳木斯等地区以南为一年一代；３．内蒙古的绰源、绰尔及黑龙江省的北安、德都、带岭等地区为一年一代及

BIONOMICS AND NATURAL ENEMIES OF DENDROLIMUS SUPERANS

The bionomics and natural enemies of D. superans were studied in Daxingan Mountains, Inner Mongolia. The results indicated that 93% of D. superans had one generation in two years, and 7% had one generation in one year in Chuoyuan region, Inner Mongolia. The results obtained from the investigation in 1995 are summrized as follows: D. superans finished one generation in 2 years in the areas of Shibazhan, Huma, Xinlin and Songling in Heilongjiang Province, finished 1 generation in 1 year in the regions of Qiqihar, Yichun and Jamusi. Chuoyuan, Chuor (in Inner Mongolia) and Bei'an, Dedu, Dailing (in Heilongjiang) are crossing zone where D. superans can complete a generation in a year or 2 years. As for the D. superans that complete a generation in a year, its larva have 7 instars, and as for those who complete a generation in two years, their larvae have 9 instars. 27 natural enemiy spceies were firstly found for the pest, including DsCPV and DsNPV that were firstly found in China. D.superans was rampant in the Daxing'an Mountains in Inner Mongolia in 1991-94. The highest density was more than 400 larva /tree, and the averange density was 54 larva /tree. 93% of D.superans complete 1 generation in 2 years. Bark beetles invade artificial larch stunds after the D.superans infection. and cause a heavy damage to the forestry production.